Horizontal Movement of Ordos Block and the Interaction of Ordos Block and Adjacent Blocks
Received date: 2004-08-06
Revised date: 2004-11-25
Online published: 2005-05-15
根据GPS实测资料和三维粘弹性模型数值模拟分析,认为鄂尔多斯地块的现今水平运动状态可以分解为两个部分:一部分为其自身的逆时针旋转,另一部分从属于中国东部大陆整体运动,二者的叠加形成鄂尔多斯地块现今水平运动状态的宏观表现形式.这种认识可以较好地解释鄂尔多斯地块南北侧断层和东西侧断层旋转方式上的矛盾.此外,还提出一种描述鄂尔多斯地块与其周缘地块相互作用的新模式:“挤推阻碍模式”.该模式认为鄂尔多斯地块运动的主要驱动力是来自青藏地块东北缘NE向挤压力,同时华南地块和燕山地块对其南北边界存在推挤和阻碍作用.利用“挤推阻碍模式”可以从动力学的角度对鄂尔多斯地块及其周缘断裂带的现今水平运动状态进行解释.
陈小斌 , 臧绍先 , 刘永岗 , 魏荣强 . 鄂尔多斯地块的现今水平运动状态及其与周缘地块的相互作用[J]. 中国科学院大学学报, 2005 , 22(3) : 309 -314 . DOI: 10.7523/j.issn.2095-6134.2005.3.008
Based on the analysis of GPS data and the results of a 3D viscoelastic modeling，it is proposed that themacro movement form of Ordos block is composed of two parts. One is anti-clockwise rotation of Ordos block itself，and the other is the movement of the whole continent of China. This opinion can explain the contradiction of therotation directions of south，north rupture belts and east，west rupture belts. Furthertmore，a new model describingthe interaction of Ordos block and adjacent blocks，“Extrusive，Impellent and Impeditive Mod(E11
Key words： Ordos; block; horiwntal movement; modeling
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